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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug symtab/27354] New: Dwarf Error: wrong unit_type in compilation
 unit header (is DW_UT_split_compile (0x05), should be DW_UT_type (0x02)
Date: Fri, 05 Feb 2021 15:50:29 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27354

            Bug ID: 27354
           Summary: Dwarf Error: wrong unit_type in compilation unit
                    header (is DW_UT_split_compile (0x05), should be
                    DW_UT_type (0x02)
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: symtab
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

When running test-case gdb.dwarf2/fission-mix.exp using gcc-11 (and using t=
he
tentative fix for PR27353), I run into:
...
(gdb) file
/home/vries/gdb_versions/devel/build/gdb/testsuite/outputs/gdb.dwarf2/fissi=
on-mix/fission-mix^M
Reading symbols from
/home/vries/gdb_versions/devel/build/gdb/testsuite/outputs/gdb.dwarf2/fissi=
on-mix/fission-mix...^M
Dwarf Error: wrong unit_type in compilation unit header (is DW_UT_split_com=
pile
(0x05), should be DW_UT_type (0x02)) [in module
/home/vries/gdb_versions/devel/build/gdb/testsuite/outputs/gdb.dwarf2/fissi=
on-mix/fission-mix2.dwo]^M
(No debugging symbols found in
/home/vries/gdb_versions/devel/build/gdb/testsuite/outputs/gdb.dwarf2/fissi=
on-mix/fission-mix)^M
(gdb) break -q main^M
...

This seems to fix it:
...
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index dd308ca7ba3..f9c058bdf17 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -12952,7 +12952,7 @@ open_and_init_dwo_file (dwarf2_cu *cu, const char
*dwo_name,
     {
       create_debug_type_hash_table (per_objfile, dwo_file.get (),
                                    &dwo_file->sections.info, dwo_file->tus,
-                                   rcuh_kind::TYPE);
+                                   rcuh_kind::COMPILE);
     }

   dwarf_read_debug_printf ("DWO file found: %s", dwo_name);
...

--=20
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